Group Of African Bullfrogs Mating In The Murky Water Of River In Central Kalahari, Botswana

group african bullfrog mating breeding season army pixie frog dip swim amphibian animal botswana central kalahari pixie africa behavior wetland swamp giant pond water male call calling park nature grass pyxicephalus adspersus rainy central kalahari game reserve creature species game reserve nat geo murky carnivore river vocal sac ecology frog national geographic habitat marsh environment national freshwater african bullfrog natural